add descriptions to all config templates of msui

[ReimarBauer]

the description is shown on mouse over in the config editor. We need to fill in data.

config_descriptions = {
        "filepicker_default": "Documentation Required",
        "data_dir": "Documentation Required",
        "predefined_map_sections": "Documentation Required",
        "num_interpolation_points": "Documentation Required",
        "num_labels": "Documentation Required",
        "default_WMS": "Documentation Required",
        "default_VSEC_WMS": "Documentation Required",
        "default_LSEC_WMS": "Documentation Required",
        "default_MSCOLAB": "Documentation Required",
        "MSS_auth": "Documentation Required",
        "MSCOLAB_auth_user_name": "Documentation Required",
        "MSCOLAB_timeout": "Documentation Required",
        "WMS_request_timeout": "Documentation Required",
        "WMS_preload": "Documentation Required",
        "wms_cache": "Documentation Required",
        "wms_cache_max_size_bytes": "Documentation Required",
        "wms_cache_max_age_seconds": "Documentation Required",
        "wms_prefetch": "Documentation Required",
        "locations": "Documentation Required",
        "new_flighttrack_template": "Documentation Required",
        "new_flighttrack_flightlevel": "Documentation Required",
        "proxies": "Documentation Required",
        "mscolab_server_url": "Documentation Required",
        "mss_dir": "Documentation Required",
        "gravatar_ids": "Documentation Required",
        "export_plugins": "Documentation Required",
        "import_plugins": "Documentation Required",
        "layout": "Documentation Required",
        "topview": "Documentation Required",
        "sideview": "Documentation Required",
        "linearview": "Documentation Required",
    }